Blowpipe.



E. s. HMB/ALL BLOWPPI-J. APPLIUATIONHLBD Nov. a, os.

Sahita/l.

Q #A7/fill; as. I nur 4 of Fig. 2.

U'Niriin rafrn'r ormon- ERASTUS S. KIMBALL, OE NEW HAVEN, CONNEGTLCUT.

Specleazion of Lettera Patent.

Patented Aug. 1'7, 1909.

Application filed November 9, 1568. Seri/allie. *$81,633.

and I do hereby 'declare the Vtolimv-ing", when taken in connection with the accompanying drawings and the characters of reference marked thereon, to be a full, clear, and exact description of the saine, and which said drawings constitute part ot this specification, and represent, in-

Figure l a side vie'v partially in section of a blow pipe constructed in accordance with my invention. Fig. i). a sectional vien' of the upper portion oi' the saine on an enlarged scale. Fig. 3 a. sectional View on'line allig. e a sectional view ofa blow pipe with a cutting nozzle. Fig. 5 a side View of the auxiliary nipple, detached. Fig. 6 a View ot' the outer end oit the blow pipe in Fig. 4.1, enlarged.

rthis invention relates to an improvement in blow pipes such as are used in Welding or in cutting nieta-l, that is, a blow pipe adapted to burn a gas with which a current oi oxygen is mixed, the objectJ ot the invention be- 111g the .construction and arrangen'ieiit of parts whereby the proper mixture and de! livery of gas and oxygen sill be made for any desired purpose; and the. invention consists in the construction hereinafter described' and particularly recited in the claims.

In carrying out my invention l employ a metal head 2 having a chamber 3 into which a gas pipe 4 discharges. Trc'ferably and as herein shown this gasy pipe l is made up of four small straight tubes 5, 5, 7 and 8 inclosed Within anouter casing which is threaded into the head. The purpose of utilizing small tubes toprevent lirebaclt. By

-using tubes of small. diameter i am enabled to use straight tubes and thus produce a com4 pact construction, Also discharging into the chamber 31s an oxygen pipe-9. rl hesc pipes pass'tlirough a sheathing 10 and are respectively provided with i'alves 11 and 12 of usual construction. Within the head isan externally threaded nipple 13 through which the onygen is discharged, and mounted on `this nipple is a cone 14 which stands over an `lopeiii'ig 15 irto which the is discharged,

and admitting of a more compact design ot' head. The outer end ot' the head is internally threaded to receive the threaded shank 17 of a nozzle 18 which, as shown in Fig. 2 of the 4drawings is the style used for welding and is a hollow nozzle having a discharge opening 19, the nozzle forming a continuation ofthe chamber 3 and-in which the air and gas are mixed before they are discharged.

li`he nozzles are interchangeable and the size of the discharge opening will depend on the thickness of the metal to be Welded. To adapt thefblow pipe for use in cutting, the welding nozzle 18 isv removed and an aux# iliary nipple 20 is screwed onto the nipple 13. This auxiliary nipple 20 has perforations 21 adjacent to the outer end of the nipple 18 and has an enlarged head 22 which ,has a series ot longitudinal grooves and terminates in a tip 24 with a discharge opening rilhe cutting nozzle-26 like the nozzle 1S is adapted to be screwed into the head and has an opening 27 in its outer end corresponding to the tip 2l which closely fits it and atone side of the opening in the'tip is a short groove 28 forming an outlet from the chamber 3 at one side of the tip. Gas

will be admitted through the cone as before v described, and into the chamber 3. There it will be mixed with oxygen entering the chamber through the perforations 21. This mixture is discharged through the small groove 28. At the same time a quantity of dxygen will pass through the auxiliary nipple and be disi'zharged adjacent to the disy charge of gas, and this blast of oxygen adjacent to the flange produces excessive heal which readily cuts the metal.. The grooves in the auxiliary nipple also tend to prevent rebacli.

l claim z- 1. A blowv pipe comprising ahead, a chamber within said head, a nozzle attached to said head, a nipple in said chamber, a cone mounted on said nipple,` an auxiliary nipple connected with said nipple, per'orations in the auxiliary nipple adjacent to the stationarf nipple, said auxiliary nipple formedA near its outer eind with an enlar ed' head having longitudinal grooves, an with a v reduced tip5'said nozzle inclosiiig the auii iliary nippleand having 11n-opening in irs end conforming to che said tip, and a discharge groove at one side of the tip, substantially as described. l

2. A blow pipe comprising a head, a chamber within said head, a nozzle attached to said head, a nipple in said chamber, an

air pipe, a cone mounted on said nipple, and

10` a gas pipe, said gaspipe composed of a plul I ral'ity of small straight tubes, substantially as described. I

In tesimoiiy whereof, I have signed this specification in the presence of two subscribing Witnesses.

v1:1.IMSTUQC; s. MMBALL.

lll'itnesses: l

FREDERIC Gf EARLE, CLARA L. WERD. 

